CONTROL METHOD OF EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION SYSTEM

摘要

In the forced regeneration control of an exhaust gas purifier (12), control data such as the number of meshes of a data map and the number of data maps in forced regeneration control is reduced, and generation of torque shock is avoided by varying a fuel pressure smoothly. In the forced regeneration control of an exhaust gas purifier (12), normal injection control is performed by stopping multi-injection in the case of heavy load operation state of an internal combustion engine (10), the control region is sectioned into a multi-injection control region (Rm), a transient region (Rt) and a normal injection control region (Rn) depending on the number of revolutions (Ne) and the load (Q) of the internal combustion engine (10), and fuel pressure control data (Pt) obtained through interpolation of fuel pressure control data (Pml) on the multi-injection control region (Rm) side and fuel pressure control data (Pnl) on the normal injection control region (Rn) side is employed in the transient region (Rt).